HFW ASTM A213 T9 Alloy Steel Seamless Tube With 11Cr Convection Tube Coil

Product Specification

HFW tube, ASTM A213 T9 Alloy Steel Seamless Tube with 11Cr , Convection Tube Coil application

Product Overview:

The ASTM A213 T9 Alloy Steel HFW Fin Tube is a specialized tube designed for use in convection heat exchangers under high-pressure situations. Manufactured from T9 alloy steel (a chrome-molybdenum alloy steel), this tube is specifically engineered for high-performance heat transfer in applications like power plants, boilers, and furnaces. The high-frequency welding (HFW) process ensures the attachment of metallic fins to the base tube, improving heat dissipation and efficiency in high-temperature and high-pressure environments, such as those found in convection heating systems.

Key Features

1. Base Tube Material: ASTM A213 T9 Alloy Steel

• ASTM A213 T9 is a chromium-molybdenum alloy steel, known for its outstanding high-temperature strength and creep resistance, making it ideal for applications exposed to high pressures and temperatures.

• The material is commonly used in superheaters, economizers, and convection heat exchangers due to its ability to withstand extreme thermal and mechanical stresses.

• T9 alloy steel provides high resistance to oxidation and thermal fatigue, ensuring long-term reliability and durability in demanding high-pressure systems.

2. Fin Type: HFW (High-Frequency Welding) Fin Tube

• The high-frequency welding (HFW) process is used to bond metal fins to the base tube, ensuring a strong and durable attachment. This process provides superior mechanical integrity under high-temperature and high-pressure conditions.

• The HFW fin tube design increases the heat transfer area, improving the overall performance of convection heat exchangers.

Chemical Composition

Base Tube: ASTM A213 T9 Alloy Steel

Mechanical Properties

Base Tube: ASTM A213 T9 Alloy Steel

Advantages of HFW Fin Tubes in Economizers for High-Pressure Applications

1. Superior High-Temperature Resistance:

   • The T9 alloy steel offers exceptional creep resistance and high-temperature oxidation resistance, making it ideal for use in convection heat exchangers and furnaces under extreme conditions.

2. Enhanced Heat Transfer Efficiency:

   • The HFW (high-frequency welding) fin tube design increases the heat transfer surface area, making it more efficient in transferring heat from the working fluid to the environment, which is essential in high-pressure heat exchangers.

3. Corrosion Resistance:

   • Aluminum fins offer excellent corrosion resistance and are well-suited for high-temperature, steam, and flue gas exposure, while stainless steel fins provide long-term durability and strength in aggressive environments.

4. Durability and Strength:

   • The mechanically bonded fins and HFW construction ensure that the tube-finned structure will maintain its integrity even in harsh conditions, such as thermal cycling and mechanical stresses.

5. Cost-Effective and Reliable:

   • The combination of high-frequency welding and carbon steel base tubes provides a cost-effective solution that doesn't compromise on thermal performance or reliability in demanding high-pressure applications.

Applications

• Convection Heat Exchanger Tubes: Ideal for use in high-pressure applications in power plants, boilers, superheaters, and furnaces.

• Furnace and Heat Recovery: Used in furnaces and waste heat recovery systems where efficient heat exchange is required under high-pressure conditions.

• Industrial Cooling Systems: Used in high-temperature cooling systems in petrochemical plants, oil refineries, and other industrial settings requiring reliable heat dissipation.

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